Since my brother, sister and me got to choose whichever pet we want, I figured it's best to ask first, we can choose 3. We had a cat few years ago and figured that they are not best for house, we have a nice doggo in village but it works since he's always in yard and has plenty of space to run around, it's different from living in outskirts of a city, but even here we have huge forest so it wouldn't be a problem walking him, besides, he's nice and the cat was a total dick for some reason.
Now, we all decided that we will be having 3 of these, but we can't decide which are the best.
Also, one more thing, since our cousins in village have ostriches, yes, they have 2 huge grown ass ostriches in their yard, we want to take something similar for our own and would this nice bird be a good choice?
I'm against having wild animals as pets, since they are not domesticated. But if you really have to choose one, I'd say the capybara because they're the closest to domesticated out of all of those. Some cultures even keep and breed them for meat. But you'll have to keep in mind that they hate cramped spaces and rely a lot on lakes or other large bodies of water to regulate their temperature.
All others are a big no as pets, specially the first three. You can befriend some in the wild maybe, but unless you're rescuing them and they're unable to live in the wild, it'd be needless cruelty to keep them. I guess frogs are too inert to care, but you're still going to have to keep it trapped otherwise they'll either die or flee very quickly.
It's a bad idea, get something domesticated like a goat or chicken.
Edit: that's not an ostrich btw, but from my experience with actual ostriches in farms, they are incredibly aggressive and territorial. I'm not sure how the smaller relative behaves, but I wouldn't keep any of those near children or other smaller animals.
Ostrich is a bit aggressive and can kick really hard if provoked according to my cousins. The bird that we want is a Cassowary which is basically the current Velociraptor.